ModulesInHierarchicalDirectoriesPlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const forEachBail = require("./forEachBail");
const getPaths = require("./getPaths");
/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
module.exports = class ModulesInHierarchicalDirectoriesPlugin {
/**
* @param {string | ResolveStepHook} source source
* @param {string | Array<string>} directories directories
* @param {string | ResolveStepHook} target target
*/
constructor(source, directories, target) {
this.source = source;
this.directories = /** @type {Array<string>} */ ([]).concat(directories);
this.target = target;
}
/**
* @param {Resolver} resolver the resolver
* @returns {void}
*/
apply(resolver) {
const target = resolver.ensureHook(this.target);
resolver
.getHook(this.source)
.tapAsync(
"ModulesInHierarchicalDirectoriesPlugin",
(request, resolveContext, callback) => {
const fs = resolver.fileSystem;
const addrs = getPaths(request.path)
.paths.map(p => {
return this.directories.map(d => resolver.join(p, d));
})
.reduce((array, p) => {
array.push.apply(array, p);
return array;
}, []);
forEachBail(
addrs,
(addr, callback) => {
fs.stat(addr, (err, stat) => {
if (!err && stat && stat.isDirectory()) {
const obj = {
...request,
path: addr,
request: "./" + request.request,
module: false
};
const message = "looking for modules in " + addr;
return resolver.doResolve(
target,
obj,
message,
resolveContext,
callback
);
}
if (resolveContext.log)
resolveContext.log(
addr + " doesn't exist or is not a directory"
);
if (resolveContext.missingDependencies)
resolveContext.missingDependencies.add(addr);
return callback();
});
},
callback
);
}
);
}
};